About CodeKitHub

CodeKitHub is a collection of 120+ free online tools across 13 categories, available in 13 languages. It covers everyday tools — percentage and age calculators, unit converters, health calculators like BMI and calorie needs, date and time tools, QR code generators, image compression — alongside developer utilities such as JSON formatting, Base64 encoding and timestamp conversion. Every tool runs entirely in your browser, does one job, and works on any device.

Three principles guide everything here. First, privacy: every tool runs entirely in your browser using JavaScript — your data is never uploaded, stored or logged. That makes the tools safe to use with API tokens, internal configs and other sensitive data. Second, speed: no login walls, no multi-step wizards, no waiting. You land on the page and the tool is ready. Third, honesty: tool descriptions explain what tools actually do, including their limits (for example, that Base64 is not encryption and MD5 is not safe for passwords).

The site is supported by advertising, which keeps every tool free without accounts or subscriptions.

Have a suggestion or found a bug? See the Contact page — feedback genuinely shapes which tools get built next.